U.S. patent application number 17/014411 was filed with the patent office on 2021-03-18 for oily solid cleansing cosmetic.
This patent application is currently assigned to TOKIWA CORPORATION. The applicant listed for this patent is TOKIWA CORPORATION. Invention is credited to Kenji KOKAI.
Application Number | 20210077371 17/014411 |
Document ID | / |
Family ID | 1000005101910 |
Filed Date | 2021-03-18 |
United States Patent
Application |
20210077371 |
Kind Code |
A1 |
KOKAI; Kenji |
March 18, 2021 |
OILY SOLID CLEANSING COSMETIC
Abstract
The oily solid cleansing cosmetic contains: (A) hydrogenated
castor oil, (B) a hydrocarbon-based wax, (C) an ester oil whose
viscosity at 25.degree. C. is 50 mPas or less, and (D) a nonionic
surfactant, wherein the content of the component (A) is 1% to 5% by
mass, the content of the component (B) is 1% to 5% by mass, the
content of the component (C) is 60% by mass or more, and the total
content of the component (A) and the component (B) is 4% to 7.5% by
mass.
Inventors: |
KOKAI; Kenji; (Saitama,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
TOKIWA CORPORATION |
Gifu |
|
JP |
|
|
Assignee: |
TOKIWA CORPORATION
Gifu
JP
|
Family ID: |
1000005101910 |
Appl. No.: |
17/014411 |
Filed: |
September 8, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61K 8/8111 20130101;
A61Q 1/14 20130101; A61K 8/922 20130101; A61K 8/0216 20130101; A61K
8/37 20130101; A61K 8/738 20130101 |
International
Class: |
A61K 8/37 20060101
A61K008/37; A61K 8/73 20060101 A61K008/73; A61K 8/02 20060101
A61K008/02; A61K 8/81 20060101 A61K008/81; A61Q 1/14 20060101
A61Q001/14; A61K 8/92 20060101 A61K008/92 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 12, 2019 |
JP |
2019-166255 |
Oct 18, 2019 |
JP |
2019-191388 |
Claims
1. An oily solid cleansing cosmetic containing: (A) hydrogenated
castor oil, (B) a hydrocarbon-based wax, (C) an ester oil whose
viscosity at 25.degree. C. is 50 mPas or less, and (D) a nonionic
surfactant, wherein the content of the component (A) is 1% to 5% by
mass, the content of the component (B) is 1% to 5% by mass, the
content of the component (C) is 60% by mass or more, and the total
content of the component (A) and the component (B) is 4% to 7.5% by
mass.
2. The oily solid cleansing cosmetic according to claim 1, wherein
the total content of the component (A), the component (B), the
component (C), and the component (D) is 97% by mass or more.
3. The oily solid cleansing cosmetic according to claim 1, wherein
50% by mass or more of the component (C) is an ester oil whose
viscosity at 25.degree. C. is 20 mPas or less.
4. The oily solid cleansing cosmetic according to claim 1, wherein
the component (B) is a polyethylene wax having a melting point of
70.degree. C. to 110.degree. C.
5. The oily solid cleansing cosmetic according to claim 1, wherein
the mass ratio (A)/(B) of the component (A) and the component (B)
is 1/5 to 1/1.
6. The oily solid cleansing cosmetic according to claim 1, wherein
the hardness at 25.degree. C. is 0.3 to 1.2 N.
7. The oily solid cleansing cosmetic according to claim 1, wherein
the component (C) contains a first ester oil whose viscosity at
25.degree. C. is 1 to 15 mPas and a second ester oil whose
viscosity at 25.degree. C. is 16 to 50 mPas, and the mass ratio
between the first ester oil and the second ester oil, (first ester
oil)/(second ester oil), is 1/1 to 4/1.
8. The oily solid cleansing cosmetic according to claim 1, wherein
the oily solid cleansing cosmetic contains one kind or two or more
kinds of liquid oil other than the component (C) selected from the
group consisting of an aliphatic alcohol and a silicone oil, and
the mass ratio between the component (C) and the liquid oil other
than the component (C), (component (C))/(liquid oil other than
component (C)), is 2/1 to 20/1.
9. The oily solid cleansing cosmetic according to claim 1, wherein
the total content of the component (A), the component (B), the
component (C), and the component (D) is 97% by mass or more, the
mass ratio (A)/(B) of the component (A) and the component (B) is
1/5 to 1/1, and 50% by mass or more of the component (C) is an
ester oil whose viscosity at 25.degree. C. is 20 mPas or less.
Description
TECHNICAL FIELD
[0001] The present invention relates to an oily solid cleansing
cosmetic.
BACKGROUND
[0002] In recent years, numerous makeup cosmetics having excellent
makeup durability have been developed. Therefore, for the removal
of makeup, oily cleansing cosmetics having favorable compatibility
with makeup cosmetics (makeup compatibility) are suitable. Oily
cleansing cosmetics are generally provided in a liquid or solid
form.
[0003] A liquid oily cleansing cosmetic contains liquid oil as a
main component, and it is known that the compatibility with makeup
cosmetics is especially excellent and the cleansing effect is high.
However, since a liquid oily cleansing cosmetic has low viscosity
there is a problem that the cosmetic easily drips at the time of
use, and there is also a problem that the friction movement during
use is likely to be directly transferred to the skin, and the
burden or stimulation to the skin is strongly felt.
[0004] On the other hand, in a solid oily cleansing cosmetic, solid
oil such as wax is incorporated therein in addition to liquid oil,
and as liquid oil is incorporated into a card house structure
formed by solid oil, an oil gel structure in which the fluidity of
the liquid oil is suppressed is formed. Such an oily solid
cleansing cosmetic can be easily handled as compared to liquid
cleansing cosmetics, and since an oily solid cleansing cosmetic
gives shearing stress to the oil gel structure during use, parts of
the structure are disintegrated, and the liquid oil can be caused
to spread out on the skin and become compatible with makeup
cosmetics. Enhancement of the spread-out and the makeup
compatibility of the oily solid cleansing cosmetics has also been
investigated, and for example, in Japanese Unexamined Patent
Publication No. 2017-095375, an oily solid cleansing cosmetic in
which a polysaccharide fatty acid ester and a solid anionic
surfactant are further incorporated in addition to a liquid oil and
a solid oil, has been suggested.
SUMMARY
[0005] In conventional oily solid cleansing cosmetics, since an oil
gel structure becomes rigid at the time of low temperature such as
the winter season, the cleansing cosmetics cannot be easily taken
out from the containers, and the compatibility with makeup
cosmetics may be deteriorated. When the content of the solid oil is
reduced and the oil gel structure is made weak in order to improve
the usability at low temperature, storage stability becomes
insufficient because the hardness is decreased in a temperature
cycle test, or the like. Therefore, it is difficult to achieve both
usability and storage stability in a well-balanced manner, simply
by changing the amount of the solid oil only and adjusting the
strength of the oil gel structure. Incidentally, there is also a
technique of reinforcing the oil gel structure by using an oil
gelling agent in combination with the cosmetic of the
above-described patent literature; however, the technique cannot be
said to be necessarily satisfying in view of usability because the
makeup compatibility is deteriorated, sliminess is felt, and the
like.
[0006] The present invention was achieved in view of the
circumstances described above, and it is an object of the invention
to provide an oily solid cleansing cosmetic that can be easily
taken out from, the container, has excellent compatibility with
makeup cosmetics, and can achieve both satisfactory usability with
less sliminess and sufficient storage stability that makes the
hardness not easily changeable.
[0007] In order to solve the problems described above, the present
invention provides an oily solid cleansing cosmetic containing: (A)
hydrogenated castor oil; (B) a hydrocarbon-based wax; (C) an ester
oil whose viscosity at 25.degree. C. is 50 mPas or less; and (D) a
nonionic surfactant, wherein the content of the component (A) is 1%
to 5% by mass, the content of the component (B) is 1% to 5% by
mass, the content of the component (C) is 60% by mass or more, and
the total content of the component (A) and the component (B) is 4%
to 7.5% by mass.
[0008] As the oily solid cleansing cosmetic of the present
invention has the above-described configuration, the oily solid
cleansing cosmetic can be easily taken out from the container, has
excellent compatibility with makeup cosmetics, and can achieve both
satisfactory usability with less sliminess and sufficient storage
stability that makes the hardness not easily changeable.
[0009] The inventors of the present invention consider the reason
why the above-described effects are obtained, as follows. By
incorporating hydrogenated castor oil, the oil gel structure formed
by including a hydrocarbon-based wax and the above-described
specific ester oil is stabilized. Furthermore, it is considered
that as the various components are included at the above-described
particular contents, storage stability is sufficient, the oil gel
structure is disintegrated with light shearing stress at the time
of use, and a sherbet-like structure in which the ester oil easily
spreads out without feeling sliminess, can be formed. Furthermore,
the present inventors think that the specific ester oil having
excellent makeup compatibility and spreading is also a factor by
which satisfactory usability is obtainable.
[0010] With regard to the oily solid cleansing cosmetic of the
present invention, from the viewpoints of makeup compatibility and
spread-out, it is preferable that the total content of the
component (A), the component (B), the component (C), and the
component (D) is 97% by mass or more.
[0011] From the viewpoint of being easily compatible with makeup
cosmetics and obtaining usability with less sliminess, it is
preferable that 50% by mass or more of the component (C) is an
ester oil whose viscosity at 25.degree. C. is 20 mPas or less.
[0012] From the viewpoint of shape retainability, it is preferable
that the component (B) is a polyethylene wax at a melting point of
70.degree. C. to 110.degree. C.
[0013] From the viewpoint of obtaining more satisfactory usability
while sufficiently maintaining storage stability, it is preferable
that the mass ratio (A)/(B) between the component (A) and the
component (B) is 1/5 to 1/1.
[0014] With regard to the oily solid cleansing cosmetic of the
present invention, from the viewpoint of being easily taken out
from the container and obtaining usability with further less
sliminess, it is preferable that the hardness at 25.degree. C. is
0.3 to 1.2 N.
[0015] According to the present invention, there can be provided an
oily solid cleansing cosmetic that can be easily taken out from the
container, has excellent compatibility with makeup cosmetics, and
can achieve both satisfactory usability with less sliminess and
sufficient storage stability that makes the hardness not easily
changeable.
DETAILED DESCRIPTION
[0016] The oily solid cleansing cosmetic of the present embodiment
contains: (A) hydrogenated castor oil (hereinafter, may be referred
to as component (A)); (B) a hydrocarbon-based wax (hereinafter, may
be referred to as component (B)); (C) an ester oil whose viscosity
at 25.degree. C. is 50 mPas or less (hereinafter, may be referred
to as component (C)); and (D) a nonionic surfactant (hereinafter,
may be referred to as component (D)).
[0017] <(A) Hydrogenated Castor Oil>
[0018] Regarding the hydrogenated castor oil (hardened castor oil),
any hydrogenated castor oil can be used without particular
limitation as long as it is used for perfumery and cosmetics.
Regarding the hydrogenated castor oil, commercially available
products such as Hardened Castor Oil A (manufactured by ITOH OIL
CHEMICALS CO., LTD., product name), Castor Wax A Flakes
(manufactured by NOF Corp., product name), and HIMAKO (manufactured
by KF TRADING CO., LTD., product name) can be used.
[0019] Regarding the component (A), one kind thereof can be used
alone, or two or more kinds thereof can be used in combination.
[0020] The content of the component (A) in the oily solid cleansing
cosmetic can be set to 1% to 5% by mass based on the total amount
of the cosmetic, and may be 1% to 4% by mass, may be 1% to 3% by
mass, or may be 1% to 2% by mass.
[0021] <(B) Hydrocarbon-Based Wax>
[0022] Examples of the hydrocarbon-based wax include polyethylene
wax, paraffin wax, microcrystalline wax, Fischer-Tropsch wax,
Ceresin, ozokerite, and the like.
[0023] Regarding the component (B), one kind thereof can be used
alone, or two or more kinds thereof can be used in combination.
[0024] From the viewpoints of shape retainability and storage
stability, the hydrocarbon-based wax is such that the melting point
is preferably 70.degree. C. to 110.degree. C., more preferably
80.degree. C. to 110.degree. C., and even more preferably
80.degree. C. to 105.degree. C.
[0025] The melting point according to the present specification
means a value measured according to the following method.
[0026] First, about 5 mg of a sample is weighed and placed in an
aluminum sample pan. An aluminum cover is attached to this pan, and
the pan is installed in a differential scanning calorimeter
"DSC7020" (manufactured by Hitachi High-Tech Science Corp., product
name). Using an electric cooling unit "POLYSCIENCE" (manufactured
by Hitachi High-Tech Science Corp., product name), a sample and a
reference sample are maintained for one minute at 0.degree. C.
under a nitrogen gas flow rate of 30 to 50 mL/min. Subsequently, a
melt endothermic curve is obtained by raising the temperature from
0.degree. C. to 120.degree. C. at a rate of temperature increase of
10.degree. C./min, lowering the temperature from 120.degree. C. to
0.degree. C. under a condition for temperature decrease of
-10.degree. C./min, and raising the temperature again from
0.degree. C. to 120.degree. C. at a rate of temperature increase of
10.degree. C./min. The peak temperature of the melt endothermic
curve in the second temperature increase at this time is designated
as the melting point.
[0027] From the viewpoint of storage stability, it is preferable
that the oily solid cleansing cosmetic includes a polyethylene wax
having a melting point of 70.degree. C. to 110.degree. C., and
preferably 80.degree. C. to 105.degree. C.
[0028] The content of the component (B) in the oily solid cleansing
cosmetic can be set to 1% to 5% by mass based on the total amount
of the cosmetic, and the content may be 2% to 5% by mass, may be 3%
to 5% by mass, or may be 4% to 6% by mass.
[0029] From the viewpoint of achieving both usability and storage
stability at a high level, the total content of the component (A)
and the component (B) is preferably 4% to 7.5% by mass, more
preferably 4% to 7% by mass, and even more preferably 4% to 6% by
mass, based on the total amount of the cosmetic.
[0030] Furthermore, from the viewpoint of obtaining more
satisfactory usability while sufficiently maintaining storage
stability, the mass ratio (A)/(B) between the component (A) and the
component (B) is preferably 1/5 to 1/1, more preferably 1/5 to 1/3,
and even more preferably 1/5 to 1/2.
[0031] <(C) Ester Oil Whose Viscosity at 25.degree. C. is 50
mPas or Less>
[0032] Examples of the ester oil whose viscosity at 25.degree. C.
is 50 mPas or less include triethylhexanoin, isopropyl palmitate,
ethylhexyl palmitate, h exyldecyl ethylhexanoate, cetyl
ethylhexanoate, isononyl isononanoate, isotridecyl isononanoate,
isopropyl isostearate, isostearyl isostearate, neopentyl glycol
diethylhexanoate, glyceryl tri(caprylate/caprate), neopentyl glycol
dicaprate, propanediol diisostearate, trimethylolpropane
triethylhexanoate, isopropyl myristate, octyl dodecyl myristate,
and the like.
[0033] The viscosity at 25.degree. C. of the ester oil according to
the present specification refers to a value at the time of
measuring the viscosity for a sample at 25.degree. C. using a type
B viscometer under the conditions of a BL adaptor and a speed of
rotation of 12 rpm.
[0034] Regarding the component (C), one kind thereof can be used
alone, or two or more kinds thereof can be used in combination.
[0035] From the viewpoint of makeup compatibility, the content of
the component (C) in the oily solid cleansing cosmetic is
preferably 60% by mass or more, more preferably 70% by mass or
more, even more preferably 75% by mass or more, and still more
preferably 80% by mass or more, based on the total amount of the
cosmetic. From the viewpoints of shape retainability and storage
stability, the content is preferably 95% by mass or less, more
preferably 90% by mass or less, and even more preferably 85% by
mass or less.
[0036] From the viewpoint that it is easily compatible with makeup
cosmetics and usability with further less sliminess is easily
obtainable, it is preferable that 50% by mass or more, more
preferably 60% by mass or more, and even more preferably 70% by
mass or more, of the component (C) is an ester oil whose viscosity
at 25.degree. C. is 20 mPas or less, and more preferably an ester
oil whose viscosity at 25.degree. C. is 15 mPas or less.
[0037] Examples of the ester oil whose viscosity at 25.degree. C.
is 20 mPas or less include ethylhexyl palmitate, isopropyl
myristate, isopropyl isostearate, cetyl ethylhexanoate, and the
like.
[0038] From the viewpoints of makeup compatibility and storage
stability, it is preferable that the oily solid cleansing cosmetic
contains, as the component (C), a first ester oil whose viscosity
at 25.degree. C. is 1 to 15 mPas, more preferably 5 to 15 mPas, and
even more preferably 7 to 13 mPas; and a second ester oil whose
viscosity at 25.degree. C. is 16 to 50 mPas, more preferably 20 to
50 mPas, even more preferably 20 to 40 mPa-s, still more preferably
25 to 35 mPas, and particularly preferably 25 to 32 mPas. From the
viewpoint of satisfying the makeup compatibility, storage
stability; and the absence of sliminess at a higher level,
regarding the second ester oil, the viscosity at 25.degree. C. is
preferably 25 to 35 mPas, and more preferably 25 to 32 mPas.
[0039] The mass ratio between the first ester oil and the second
ester oil, (first ester oil)/(second ester oil), is preferably 1/1
to 4/1, more preferably 2/1 to 4/1, and even more preferably 3/1 to
4/1, from the viewpoint of reducing sliminess.
[0040] <(D) Nonionic Surfactant>
[0041] Examples of the nonionic surfactant include a
polyoxyalkylene alkyl ether, a glycerin alkyl ether, a glycerin
fatty acid ester, a polyglycerin fatty acid ester, a sorbitan fatty
acid ester, alkylene glycol adducts of those, a polyalkylene glycol
fatty acid ester, a polyglycerin-modified silicone, a
polyether-modified silicone, and the like.
[0042] Regarding the component (D), one kind thereof can be used
alone, or two or more kinds thereof can be used in combination.
[0043] Regarding the component (D), from the viewpoint of the ease
of washing away with water or lukewarm water after cleansing, the
HLB is preferably 7 or higher, and from the viewpoint of reducing
the taut feeling after washing away, the HLB is preferably 14 or
lower.
[0044] With regard to the oily solid cleansing cosmetic of the
present embodiment, from the viewpoints of makeup compatibility
spreading, the total content of the component (A), the component
(B), the component (C), and the component (D) may be 97% by mass or
more, may be 97.5% by mass or more, may be 98% by mass or more, may
be 98.5% by mass or more, or may be 99% by mass or more, based on
the total amount of the cosmetic.
[0045] In the oily solid cleansing cosmetic of the present
embodiment, in addition to the various components described above,
other components that are usually used in cosmetic products, for
example, a liquid oil other than the component (C), an anionic
surfactant, a cationic surfactant, an amphoteric surfactant, a
humectant, a viscosity adjusting agent, an antiseptic agent, a pH
adjusting agent, a chelating agent, an ultraviolet absorber,
vitamins, beauty ingredients, an oxidation inhibitor, fragrance,
and the like can be appropriately incorporated as necessary, to the
extent that does not impair the effects of the present
invention.
[0046] As the liquid oil other than the component (C), an aliphatic
alcohol, a hydrocarbon oil, a silicone oil, an ester oil whose
viscosity at 25.degree. C. is more than 50 mPas, or the like can be
used. Examples of the aliphatic alcohol include aliphatic alcohols
that are liquid at 25.degree. C., such as octyldodecanol,
hexyldodecanol, isostearyl alcohol, and oleyl alcohol. Examples of
the silicone oil include methyl polysiloxane, methyl phenyl
polysiloxane, octamethylcyclotetrasiloxane,
decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane,
stearoxymethyl polysiloxane, diphenylsiloxy phenyl trimethicone, a
fluorine-modified silicone, and the like. Examples of the
hydrocarbon oil include liquid paraffin, squalene, hydrogenated
polyisobutene, and the like. Examples of the ester oil whose
viscosity at 25.degree. C. is more than 50 mPas include ethylhexyl
hydroxystearate, diisopropyl dilinoleate, trimethylolpropane
triisostearate, polyglyceryl-2 triisostearate, polyglyceryl-2
diisostearate, polyglyceryl-2 isostearate, diisostearyl malate,
polyglyceryl-3 diisostearate, and the like.
[0047] The content of the liquid oil other than the component (C)
in the oily solid cleansing cosmetic may be 0.1% to 30% by mass
based on the total amount of the cosmetic, from the viewpoint of
reducing the taut feeling after washing away.
[0048] In a case in which the oily solid cleansing cosmetic
includes a liquid oil other than the component (C), from the
viewpoint of makeup compatibility, the total content of the
component (C) and the liquid oil other than the component (C) is
preferably 70% to 95% by mass, and more preferably 80% to 85% by
mass, based on the total amount of the cosmetic. Furthermore, from
the viewpoint of storage stability, the mass ratio between the
component (C) and the liquid oil other than the component (C),
(component (C))/(liquid oil other than component (C)), is
preferably 2/1 to 20/1, more preferably 2/1 to 10/1, even more
preferably 2/1 to 8/1, and still more preferably 2.5/1 to 5/1.
[0049] It is preferable that the oily solid cleansing cosmetic of
the present embodiment includes one kind or two or more kinds
selected from, the group consisting of an aliphatic alcohol and a
silicone oil, as the liquid oil other than the component (C).
[0050] Regarding the oily solid cleansing cosmetic of the present
embodiment, from the viewpoint of being easily taken out from the
container and obtaining usability with further less sliminess, the
hardness measured using a rheometer (manufactured by RHEOTECH) with
the tip shape of the pressure-sensitive shaft: disc having a
diameter of 5 mm, the rate of penetration: 6 cm/min, the depth of
penetration: 10 mm, and temperature: 25.degree. C. is preferably
0.3 to 1.2 N, more preferably 0.4 to 1.1 N, and even more
preferably 0.5 to 1.0 N.
[0051] Next, a method for producing an oily solid cleansing
cosmetic of the present embodiment will be described.
[0052] The method for producing an oily solid cleansing cosmetic of
the present embodiment comprises a step of preparing a cosmetic
base material containing the above-mentioned component (A),
component (B), component (C), and component (D) as well as other
components as necessary; and a step of charging the cosmetic base
material into a predetermined container and solidifying the
cosmetic base material.
[0053] Regarding the cosmetic base material, the composition can be
appropriately set so as to obtain the oily solid cleansing cosmetic
of the present embodiment as described above. The mixing amounts of
the various components in the cosmetic base material can also be
adjusted similarly to the preferred ranges for the above-mentioned
oily solid cleansing cosmetic.
[0054] Regarding the preparation of the cosmetic base material, a
method of mixing the above-mentioned component (A), component (B),
component (C), component (D), and optionally other components while
heating the components may be used.
[0055] The mixing means is not particularly limited; however, for
example, a Disper, a Homomixer, and the like can be used. The
heating temperature can be set to a temperature higher than or
equal to the melting points of the component (A) and the component
(B).
[0056] Solidification of the cosmetic base material can be carried
out by, for example, a method of cooling the cosmetic base material
before charging to room temperature, or the like.
[0057] Examples of the predetermined container include a bottle, a
tube, a jar, a pouch container, and the like.
EXAMPLES
[0058] Hereinafter, the present invention will be more specifically
described by way of Examples; however, the present invention is not
intended to be limited to the following Examples.
Production of Oily Solid Cleansing Cosmetic
Examples 1 to 15 and Comparative Examples 1 to 7
[0059] The various components shown in Tables 1 to 3 were mixed at
105.degree. C. at the proportions (% by mass) indicated in the same
tables using a Disper, and the respective oily solid cleansing
cosmetics were obtained.
[0060] Incidentally, the details of the various components shown in
Tables 1 to 3 are as follows.
[0061] Hydrogenated castor oil: Melting point 85.degree. C. to
87.degree. C.
[0062] Polyethylene wax A: PERFORMALENE 500 POLYETHYLENE
(manufactured by Baker Petrolite LLC, product name, melting point
83.8.degree. C.)
[0063] Polyethylene wax B: PERFORMALENE 655 POLYETHYLENE
(manufactured by Baker Petrolite LLC, product name, melting point
96.7.degree. C.)
[0064] Candelilla wax: Melting point 75.degree. C. to 85.degree. C.
(catalogue value)
[0065] Carnauba wax: Melting point 80.degree. C. to 86.degree. C.
(catalogue value)
[0066] Ethylhexyl palmitate: Viscosity 11 mPas @ 25.degree. C.
[0067] Triethylhexanoin: Viscosity 31 mPas @ 25.degree. C.
[0068] Glyceryl tri(caprylate/caprate): Viscosity 26 mPas @
25.degree. C.
[0069] Isostearyl isostearate: Viscosity 36 mPas @ 25.degree.
C.
[0070] Dimethicone: Viscosity 6 mPas @ 25.degree. C.
[0071] Diphenylsiloxyphenyltrimethicone: Viscosity 15 mPas @
25.degree. C.
[0072] (Melting Point of Wax)
[0073] The melting point of a wax was measured by the following
procedure.
[0074] About 5 mg of a sample was weighed and placed in an aluminum
sample pan. An aluminum cover was attached to this pan, and the pan
was installed in a differential scanning calorimeter "DSC7020"
(manufactured by Hitachi High-Tech Science Corp., product name).
Using an electric cooling unit "POLYSCIENCE" (manufactured by
Hitachi High-Tech Science Corp., product name), a sample and a
reference sample were maintained for one minute at 0.degree. C.
under a nitrogen gas flow rate of 30 to 50 mL/min. Subsequently, a
melt endothermic curve was obtained by raising the temperature from
0.degree. C. to 120.degree. C. at a rate of temperature increase of
10.degree. C./min, lowering the temperature from 120.degree. C. to
0.degree. C. under a condition for temperature decrease of
-14.degree. C./min, and raising the temperature again from
0.degree. C. to 120.degree. C. at a rate of temperature increase of
14.degree. C./min. The peak temperature of the melt endothermic
curve in the second temperature increase at this time was
designated as the melting point.
[0075] (Viscosity of Ester Oil)
[0076] For a sample at 25.degree. C., the viscosity was measured
using a type B viscometer under the conditions of a BL adaptor and
a speed of rotation of 12 rpm. Incidentally, the measurement time
was set to 1 minute. Furthermore, even for a liquid oil other than
an ester oil, the viscosity was measured under similar
conditions.
[0077] <Evaluation of Oily Solid Cleansing Cosmetic>
[0078] For an oily solid cleansing cosmetic, the initial hardness,
usability (ease of taking out, makeup compatibility, absence of
sliminess), and storage stability were evaluated according to the
following evaluation methods. The results are presented in Tables 1
and 2.
[0079] (Initial Hardness)
[0080] A sample for measurement obtained by charging a cosmetic
into an ointment jar having a capacity of 20 mL and leaving the
cosmetic to stand overnight at 25.degree. C. was prepared. For this
sample for measurement, the hardness was measured using a rheometer
(manufactured by RHEOTECH) under the conditions of the tip shape of
the pressure-sensitive shaft: disc having a diameter of 5 mm, speed
of penetration: 6 cm/min, depth of penetration: 10 mm, and
temperature: 25.degree. C.
[0081] (Usability: Ease of Taking Out, Make Compatibility, and
Absence of Sliminess)
[0082] Ten expert panels for cosmetic product evaluation were asked
to use samples, and each panel performed a 5-grade evaluation for
the ease of taking out from the container, makeup compatibility at
the time of being applied on the skin, and the absence of
sliminess, according to the following evaluation criteria. Each
panel assigned a score for each sample, and the average point of
the scores given by all the panels was judged according to the
following criteria.
[0083] [Evaluation Criteria]
[0084] 5 points: Very satisfactory
[0085] 4 points: Satisfactory
[0086] 3 points: Normal
[0087] 2 points: Slightly poor
[0088] 1 point: Poor [Judgment Criteria (Average Point of
Scores)]
[0089] A: 4.5 or higher
[0090] B: 3.5 or higher and lower than 4.5
[0091] C: 2.5 or higher and lower than 3.5
[0092] D: Lower than 2.5
[0093] (Storage Stability)
[0094] 100 g of a cosmetic was charged into a jar container and was
stored for one week in a cyclic constant-temperature tank at
5.degree. C. to 40.degree. C. For the cosmetic after storage, the
hardness was measured by a method similar to that for the initial
hardness, the change ratio of the hardness to the initial hardness
was determined, and the change ratio was judged in 3 grades
according to the following criteria.
[0095] [Judgment Criteria]
[0096] A: The change ratio with respect to the initial hardness is
.+-.0% or higher and 20% or lower.
[0097] B: The change ratio with respect to the initial hardness is
higher than .+-.20% and 50% or lower.
[0098] C: The change ratio with respect to the initial hardness is
higher than .+-.50%.
TABLE-US-00001 TABLE 1 Example Example Example Example Example
Example Example Example 1 2 3 4 5 6 7 8 (A) Hydrogenated 2.00 2.00
2.00 1.00 2.00 2.50 3.00 1.00 castor oil (B) Polyethylene wax A
4.00 4.00 4.00 5.00 5.00 5.00 3.00 3.00 Polyethylene wax B -- -- --
-- -- -- -- -- (C) Ethylhexyl 64.00 64.00 64.00 64.00 63.00 62.50
64.00 64.00 palmitate Triethylhexanoin 20.00 -- -- 20.00 20.00
20.00 20.00 20.00 Glyceryl -- 20.00 -- -- -- -- -- --
tri(caprylate/caprate) Isostearyl isostearate -- -- 20.00 -- -- --
-- -- (D) PEG-20 glyceryl 10.00 10.00 10.00 10.00 10.00 10.00 10.00
10.00 triisostearate Evaluation Initial hardness (N) 0.67 0.88 0.83
0.85 1.08 1.29 1.01 0.38 Usability A A A A B C B B (ease of taking
out) Usability A A A A A B B A (makeup compatibility) Usability A A
B A A B B A (absence of sliminess) Storage stability A A A A A A A
A
TABLE-US-00002 TABLE 2 Example 9 Example 10 Example 11 Example 12
Example 13 Example 14 Example 15 (A) Hydrogenated 2.00 2.00 5.00
4.00 2.00 2.00 2.00 castor oil (B) Polyethylene wax A -- 2.00 1.00
2.00 4.00 4.00 4.00 Polyethylene wax B 4.00 2.00 -- -- -- -- -- (C)
Ethylhexyl 64.00 64.00 64.00 64.00 20.00 64.00 64.00 palmitate
Triethyl hexanoin 20.00 20.00 20.00 20.00 64.00 -- -- Liquid oil
Dimethicone -- -- -- -- -- 20.00 other than
Diphenylsiloxyphenyltrimethicone -- -- -- -- -- -- 20.00 (C) (D)
PEG-20 glyceryl 10.00 10.00 10.00 10.00 10.00 10.00 10.00
triisostearate Evaluation Initial hardness (N) 0.74 0.63 1.42 1.07
0.95 0.88 0.83 Usability A A C B A A A (ease of taking out)
Usability A A B B B A A (makeup compatibility) Usability A A B B C
A A (absence of sliminess) Storage stability A A A A A A A
TABLE-US-00003 TABLE 3 Comparative Comparative Comparative
Comparative Comparative Comparative Comparative Example 1 Example 2
Example 3 Example 4 Example 5 Example 6 Example 7 (A) Hydrogenated
3.00 -- -- -- -- -- -- castor oil (B) Polyethylene wax A 5.00 6.00
4.00 4.00 2.00 1.00 4.00 Candelilla wax -- -- 2.00 -- -- -- --
Carnauba wax -- -- -- 2.00 -- -- -- Dextrin palmitate -- -- -- --
4.00 5.00 2.00 (C) Ethylhexyl 62.00 64.00 64.00 64.00 64.00 64.00
64.00 palmitate Triethylhexanoin 20.00 20.00 20.00 20.00 20.00
20.00 20.00 (D) PEG-20 glyceryl 10.00 10.00 10.00 10.00 10.00 10.00
10.00 triisostearate Evaluation Initial hardness (N) 1.72 1.07 0.38
1.05 0.03 0.05 0.07 Usability D C B C D D D (ease of taking out)
Usability D C B B A A A (makeup compatibility) Usability B B B B D
D D (absence of sliminess) Storage stability A A C B A A C
Example 16
TABLE-US-00004 [0099] (Mixing proportion (Component) (mass %)) 1.
Hydrogenated castor oil 1.5 2. Polyethylene wax A 4.0 3. Ethylhexyl
palmitate 61.5 4. Octyldodecanol 20.0 5. PEG-20 glyceryl
triisostearate 13.0
[0100] The details of the respective components are as described
above. Incidentally, the viscosity at 25.degree. C. of
octyldodecanol is 49 mPas.
[0101] <Production Method>
[0102] The components of 1 to 5 were mixed at 105.degree. C. using
a Disper, and an oily solid cleansing cosmetic was obtained.
[0103] <Evaluation>
[0104] For the oily solid cleansing cosmetic thus obtained, the
above-described evaluations were carried out, and the results were
as follows: initial hardness 0.66 N, usability (ease of taking out
"A", makeup compatibility "B", absence of sliminess "A"), and
storage stability "A".
* * * * *